Stone AH, et al. - Experts sought to identify which patients were at highest risk for emergency room (ER) visits or readmissions within 90 days of surgery and evaluate the reasons for return in order to formulate ways to decrease these visits and improve patient outcomes in patients undergoing primary hip and knee replacements. In this population, the overall number of unplanned interventions following total hip and total knee arthroplasty (TJA) was low and remained consistent over time despite decreasing length of stay (LOS). A higher likeliness of experiencing readmission was seen in patients that went to rehab. Findings suggested that majority of unplanned interventions occurred in the first 4 weeks following surgery. A higher ASA score was seen in patients that were readmitted. The most common reasons for the return for ER visits and readmissions were seen to be pain and swelling.